Calificación
Reparto

Caroline John
Dr. Elizabeth Shaw

Jon Pertwee
Dr. Jeremiah O'Kane

Sylvester McCoy
Dr. Colin Dove

Colin Baker
Peter Russell

Mark Gatiss
Dr. William Bruffin

Louise Jameson
Patricia Haggard

Sophie Aldred
Public Relations Officer

Linda Lusardi
Louise Bayliss

David Terence
Daniel O'Kane / Eustace O'Kane

Nicola Fulljames
Dr. Beatrice Hearst

Patricia Merrick
Dr. Julie Gilchrist

Jonathan Rigby
Cummings

Alexander Kirk
Orderly

Daniel Mills
Ghostly Child Voice

Peter Davison
Patient One